Boiler-check-valve clean-out.



J. R. MARTIN.

. BOILER cHEcK VALVE CLEAN-OUT.

' APPLICATION FILED MAR. 17,1909.

Patented Feb. 8, 1910.

Svwantoa Fig. 2 is a horizontal "section on the line nivrrnn sari tans@FFIQE vYGFLN P MARTIN, @F CLAEKSVILLE,

EQILEB-GHECF VALVE CLEAN-QUE.

Specification 01 Letters l atcnt,

Patented 8, ZQILQJO Application filed March 17, 1969. Serial lfto.scenic,

To all whom it may concern:

Be it known that I, JOHN R; MARTIN, a

citizen of the United States of America, and

a resident of Clarksville, county of .Montgomery, State of Tennessee,have invented certain new and useful Improvements in Boiler Check ValveClean Outs, of which the following is a full and clear specification,reference being had to the accompanying drawing, in which Figure 1 is avertical section of the checkvalve provided with my improvements; and,

2-2 of Fig. 1.

I In locomotives it is universally the pract1ce to place a check-valvein the feed-water passage leading from the injector to. the boiler, tocheck the back flow of the water that is fed into the boiler. Itfrequently happens that foreign matter will get in between the valve andits seat and thus -inter-. fere with its proper opening and closing. Thecommon practice now when the valve gets out of order in that way is todraw the fire from the engine and dismantle the valvecasing and cleanout the valve byhand. This involves a serious delay and loss of use ofthe locomotive and it is the object of my invention to apply acheck-valve attachment whereby the valve-seat may be cleaned out withouteither drawingthe fire or dismantllng the valve-casing, as more fullyhereinafter set forth. I have heretofore patented one form of an.apparatus for overcoming this objection, my poatent being numbered913,023, and dated Fe ruary 23, 1909, and the present improvements aredesigned to adapt the device for use on boilers enerally and to simplifythe construction %)y roviding means whereby when the blow-o valve isopened the check-valve will be opened by the move ment thereof. 7

Referring to the drawings by reference letters, adesignates the casingof the usual check-valve, b the inlet-nipple connected to the injector,0 the outlet-mpple adapted for connection to the boiler, and d the usualcheck-valveprovided with the usual depending)guides e. p v

e endin from the casing a is a portion of a low-o pi e f and seated inthe top of this pipe is a low-01f valve 9 having the form of acheck-valve similar in type to the check-Valve d and having a dependingguide it .of the usual form. This check-blow-ofi' valve is so locatedwith reference to the check-valve proper that when it is lifted it willstrike agalnst the lower end of the check-valve and raise the same fromits seat.

To lift the check-valve at will I journal a rock-shaft z in the blow-offpipe and provide the same with an eccentric j directly below the tail ofthe blow-0E valve. The shaft 2' works through a stuffing-box 7c and isprovided with an operating-lever l. 7

It will be observed that when it is desired to clean ofi the seat of thecheck-valve it is simply necessary to rock the shaft '5 a sufficientdistance to cause the eccentric to lift the blow-off valve from its seatfar enough to cause said valve to strike against the check-valve andraise it in turn from its seat, whereupon water from the boiler willrush down past the check-valve and out through the blow-off pipe andthus clean away from the check-valvesseat any foreign matter that mayhave lodged thereon.

Havin thus fully described my invention,

what I c aim as new, and deslre to secure by Letters Patent, is

1. In a device "of the class set forth, a check-valve whose casing isadapted Tfor connection to the injector and the boiler,

a blow-off pipe connected to the under side of said casing, ablow-olf-checksvalve there- -in below the check-valve and means forraising the check-valveoff its seat through the medium of the blow-0Evalve.

2. In a device of the class set forth, a check-valve-casing ada ted forconnection to the injector and the oiler, a check-valve therein, ablow-off pipe connected tosaid casing, a blow-off valve in said pipe,and means whereby the movement of the blowoff valve in the act ofopening will open the check valve; r

In testimony whereof I hereunto affix my si ature in' the presence oftwo witnesses th1s 15 day of March .1909. a

. JNO. R. MARTIN.

Witnesses:

WESLEY DRAIN, G. W. BAILEY.

